Secondary Lesson Planner is a GPT designed to aid educators in creating and organizing lesson plans for secondary school subjects. This tool is built upon the powerful language model, ChatGPT. It is an interactive platform aimed at streamlining the process of lesson planning by providing tailored suggestions and ideas. Throughout the planning process, educators can lean on the Secondary Lesson Planner GPT for a range of subject-specific inputs like creating a biology lesson plan for grade 10, brainstorming creative writing exercises, making math lessons more engaging or devising history projects. Functioning as a friendly and efficient assistant, it uses the capabilities of ChatGPT to understand and respond to user prompts effectively. While the GPT greatly simplifies the teaching aid creation process, it also leaves ample room for educators to incorporate their creativity and adapt ideas provided by the tool according to their specific classroom needs.